Mages' Contest - (Foil): Invasion Journey into Nyx All Sliver creatures have flying

All Sliver creatures have flying

Change the text of target spell or permanent by replacing all instances of one basic land type with another

the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card

Flying Whenever Abyssal Specter deals damage to a player

Threshold — As long as seven or more cards are in your graveyard

Mages' Contest - (Foil): Invasion Journey into Nyx All Sliver creatures have flyingYou and target spell's controller bid life. You start the bidding with a bid of 1. In turn order, each player may top the high bid. The bidding ends if the high bid stands. The high bidder loses life equal to the high bid. If you win the bidding, counter that spell.